EP 2459755 A2 20120606 - METHOD FOR PRODUCING DIRECT REDUCED IRON WITH LIMITED CO2 EMISSIONS AND APPARATUS THEREFOR
Title (en)
METHOD FOR PRODUCING DIRECT REDUCED IRON WITH LIMITED CO2 EMISSIONS AND APPARATUS THEREFOR
Title (de)
VERFAHREN ZUR HERSTELLUNG VON EISENSCHWAMM MIT VERMINDERTEN CO2-EMISSIONEN UND DEREN VORRICHTUNG
Title (fr)
PROCÉDÉ DE PRODUCTION DE FER PRÉRÉDUIT AUX ÉMISSIONS LIMITÉES DE CO2 ET DISPOSITIF ASSOCIÉ
Publication
Application
Priority
- US 23067509 P 20090731
- IB 2010001813 W 20100721
Abstract (en)
[origin: WO2011012964A2] A method and apparatus for producing direct reduced iron (DRI), also known as sponge iron, by means of direct contact of iron oxides with a stream of recycled and regenerated hot reducing gases containing hydrogen and carbon monoxide. The invention provides a way for decreasing the uncontained emission of CO2 to the atmosphere produced by combustion of carbon-bearing fuels in the reducing gas heater by substituting, at least partially, a gas stream mainly composed of hydrogen in lieu of the usual carbon-bearing fuels. The hydrogen fuel stream, depleted of CO2 by means of a physical gas separation unit (which can be a PSA/VPSA type adsorption unit, a gas separation membrane unit or combination of PSA/VPSA unit and a gas separation membrane unit) is derived from at least a portion of a stream of regenerated reducing gases being recycled to the reduction reactor. The derived hydrogen fuel stream is combusted in the reducing gas heater and/or other thermal equipment in the reduction plant, thus decreasing the CO2 emissions directly to the atmosphere.
IPC 8 full level
B01D 53/04 (2006.01); B01D 53/14 (2006.01); B01D 53/22 (2006.01); B01D 53/75 (2006.01); C10K 1/00 (2006.01); C21B 13/02 (2006.01)
CPC (source: EP KR US)
B01D 53/047 (2013.01 - KR); B01D 53/1475 (2013.01 - EP KR US); B01D 53/228 (2013.01 - EP KR US); B01D 53/75 (2013.01 - EP KR US); C21B 13/0073 (2013.01 - KR); C21B 13/02 (2013.01 - EP US); C21B 13/029 (2017.04 - EP KR US); B01D 53/047 (2013.01 - EP US); B01D 2257/502 (2013.01 - EP US); B01D 2257/702 (2013.01 - EP US); C21B 2100/20 (2017.04 - KR); C21B 2100/22 (2017.04 - EP US); C21B 2100/28 (2017.04 - EP US); C21B 2100/282 (2017.04 - EP US); Y02C 20/20 (2013.01 - EP US); Y02C 20/40 (2020.08 - EP US); Y02P 10/122 (2015.11 - EP US); Y02P 10/134 (2015.11 - EP US); Y02P 10/143 (2015.11 - EP US); Y02P 10/20 (2015.11 - EP US)
Citation (search report)
See references of WO 2011012964A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2011012964 A2 20110203; WO 2011012964 A3 20110421; WO 2011012964 A8 20120322; BR 112012002266 A2 20170808; CN 102712959 A 20121003; CN 102712959 B 20140625; EP 2459755 A2 20120606; EP 2459755 B1 20140903; JP 2013501140 A 20130110; JP 5696967 B2 20150408; KR 101710560 B1 20170227; KR 20120056262 A 20120601; MX 2012001425 A 20120612; RU 2012107698 A 20130910; RU 2546266 C2 20150410; US 2012125157 A1 20120524; US 8940076 B2 20150127
DOCDB simple family (application)
IB 2010001813 W 20100721; BR 112012002266 A 20100721; CN 201080044116 A 20100721; EP 10752158 A 20100721; JP 2012522264 A 20100721; KR 20127005448 A 20100721; MX 2012001425 A 20100721; RU 2012107698 A 20100721; US 201013388287 A 20100721